Demon Blade Chick by Muuten
By Xah Lee. Date:
Artist seem to be Muuten.
This piece is a fan art.
The chick is the character Momohime from the vid game Muramasa: The Demon Blade.
http://www.play-asia.com/SOap-23-83-bf73-71-z3-49-en-15-muramasa-84-j-70-3a6a.html
image source